package lesson4;

public class Demo3 {
    public static void main(String[] args) {
        step1();
        step2();
        step3();
    }

    private static void step3() {
    }

    private static void step2() {
    }

    private static void step1() {
        fun1();
        fun2();
    }

    private static void fun2() {
    }

    private static void fun1() {
    }
}
